Plate for spiral separators.



P. PARDEE.

PLATE fon sum1. summons.

APPLICATION FILED APB.. 11, 1910. l 977,033, Patented Nov. 29, 1910.

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P. PARDBE.

PLATE FOR SPIRAL SEPARATORS.

APPLIUATION FILED APR.11, 1910.

f Patented Nov. 29, 1910.

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F. PARDBE.

PLATE` FOR SPIRAL SEPARATORS. 'APPLICATION FILED APR.11, 1910.

Patented N 0V. 29, 1910.

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UNTTED STATES PATENT OFFICE.

FRANK PARDEE, 0F I-IAZLETON, PENNSYLVANIA, ASSIGNOR TO ANTHRACITE SEPARATOR COMPANY, A CORPORATION OF PENNSYLVANIA.

Specification of Letters Patent.

PLATE FOR SPIRAL SEPARATORS.

Patented Nov. 29, 1910.

To all whom fit may concern:

Be it known that I, FRANK PARDEE, a citizen of the United States, residing in Hazleton, county of Luzerne, and State of Pennsylvania, have invented certain new and useful Tmprovements in Plates for Spiral Separators, of which the following is a specification, reference being had to the accompanying drawings.

The improvement, or invention, has relation to spiral separators used chiefly in removing slate and bone from coal, the class or type of separator being shown and described in certain patents issued to me on July 25th, 1899. The spirals are composed of a series of plates or ackets having a pitch toward the axis and also downwardly toward the outlet of the'machine, and operate on the different substances by gravity, centrifugal force and frictional resistance. The differential action of the operative forces is accentuated by the inward pitch and by various retarding surfaces. These constructive features, and the length of the spiral, have been relied on for giving the slate the inside course, the bone a middle course, and the coal the outside course.

The objects of the present invention are to improve the plates or ackets; to provide means for retarding the heavier substances by suitable gradations and by plane and warped surfaces on the plates or jackets, and to construct them so that one element or the parts subjected to the most wear, may be quickly and easily renewed.

The invention consists primarily of a plate or jacket having graduated runway surfaces with varied degrees of aXial inclination along radial lines, and further in having the plate or jacket provided with graduated plane and warped surfaces, and in a double or inlaid plate the upper element of which is renewable, and may if desired, be composed of different materials, as hereinafter more fully described and pointed out in the claims.

In the drawings Figure l, is a plan view of a plate or jacket having the renewable element made of a single metal; Fig. 2, is an edge view thereof, looking up from the lower edge, and Fig. 3, an end view of the same, looking outwardly from the axis. Fig. 4, is a plan view vof a plate or jacket having the renewable parts made of two pieces of the same or diiferent materials.

Fig. 5, is an edge view thereof, looking up from the lower edge, and Fig. 6, an end view of the same looking outwardly from the aXis. Figs. 7 and 8, are respectively plan and edge views of a plate or acket, the renewable portion of which is made in two parts, and the pattern is varied from that shown by Figs. 4C, 5, and 6, so as to permit both parts to extend up and be secured by the same bolts which secure the upper edge of the lower element of the jacket, thus giving more length to the downward run on each part of the upper element, than in the previous form.

The lower element or section A, may be formed of one piece of metal, or other suitable material, made to pass outwardly from the central post, not shown, being supported by outwardly and upwardly inclined supvporting rods, not shown. All figures show the inner part a, of the element A, as warped and not covered by the upper section or element B, and it is thus left free to receive slate coming over the adjacent edge of the section B. Such slate will pass on the next lower jacket, near enough to the axis to keep it well on the inside course. The outer part a', of the element A, is also a warped uncovered surface and is formed with a bend or shoulder a2, continued in a helical or spiral course throughout the breadth or from the upper to the lower edge of the element A. This shoulder or bend a2, is about the depth of the thickness of the metal of the upper element and forms a seat for the outer or peripheral end of the element B.

The Hare, or outward and upward inclination given to the lower element A of the plate by the supporting rod, ispractically unchanged from the post outward until the shoulder or step a2, is reached, and from that point on it is changed and made to assume a different flare or upward inclination, so that the warped outer surface a', may act as a runway or leap for the coal after being free from the slate and bone. The jacket as shown is for use in the composition of a slate-thread of a spiral which also has a larger coal-thread and the coal-run a', is consequently of less width than would otherwise be the case. In. practice the coal leaps or runs off the periphery and is caught in a separate coal-thread provided for that purpose.

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' The part or renewable element B, may be madeA from one piece of metal, as shown in Figs. l to 3, or it may be made in more than one piece as shown in the other gures. In the latter case its component partsb, and b, can be of different metals or of different substances, as other materials than ,metal are sometimes used to advantage in separators of the class stated. The element B, is

so formed as to have both plane and warped contact surfaces, the inner end or edge b2, and the Asurface outwardly adjacent thereto being-plane, while more outwardly still it becomes warped and its outer ed'ge or periphery b3, takes a form suited to that of the inner edge a3, of the shoulder or step a2, of the warpedelementA. The element B, is provided at its upper side with holes for receivingV bolts at, which also pass through holes in the element A, and through the supporting'rods not shown. These bolts secure both elements in position, and ordinarily the lower edge of each jacket isn provided with holes a, so as to be secured by the bolts which secure the upper edge of the jacket next below in the series, the arrangement being such as to allow the lower edge of one jacket to overlap the upper edge of the jacket next below.

When the upper element B, is made of morethan one part, the part or portion Z2',

' which extends more to the lower outer edge of the element A, may be secured to that element by screws b, or by some means which will enable it to take the strain. A

In looking at the jacket or plate from the inner end, it will be seen that the drop for the slate from the upper element B, to the free space a, of the lower element A, increases in depth in a downwardly direction, the greatest depth of drop being near or quite at the loweriedgeof the plate. This arrangement permits the slate to run near the post, from plate to plate, without undue development of centrifugal force.

Slate'farther out on the plate is subjected to greater drops, which will reduce the centrifugal force for the time being, and -permit the forces of gravity and frictional resistance to operate so as to turn the slate to the inside course along which it subseq-uently runs. Y Materials farther out than the clear space on the element A, will drop over the edge of the element B, to the neXt plate below, which drop is greatest at the outer extremity of the clear space a, and diminishes outwardly, being reduced to practically double the thickness of the metal at the outermost part.Y YThe dividing line between the outer edge 3 of the element B, and the inner Y edge a3, of the coal runway or leap a must be crossed or the material must pass to the Vnext Vlower plate without crossing. Coal will cross the dividing line between the edge a3 and b3 on a given plate or pass over the coal leap a on a lower plate and off to the coalthread from which it finally emerges. The bone or even slate which may be carried to the Vouter edge of the element B, will meet with an interruption at the break in the continuity between the elements B, and A, at ,the edges b3, and 653, and if slate or bone works over the dividing line, the steeper inclination of the coal leap a, or of a coal-run or separate coal-thread, may be depended on for overcoming the centrifugal force, in which case stray pieces of bone or slate will be sufliciently acted on by gravity to bring them away from the coal before passing from the machine.

Apart from the steep` descent or abrupt drop at the inner and lower edges of the element B, and the flare given to the outer surface a of the element A, the changes from plane to warped surfaces on the plate are gradual and the transition easy.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A plate for spiral separators, said plate being graduated with varied degrees of axial inclination along radial lines whereby the general inclination of said plate is varied, and the pitch and Hare are changed thereby forming runways and retarding surfaces for materials differing in specific gravity and frictional resistance. f

2. A plate for spiral separators comprising plane and warped surfaces, vsaid plate being graduated with varied degrees of axial inclination along radial lines whereby the general inclination is changed thereby forming runways and retarding surfaces, said plate being adapted for a differential action on materials differing in specific gravity and frictional resistance. l

3. A plate for spiral separators, said plate having one element provided with warped surfaces near the axisand near the periphery, and another element presenting plane surfaces between the warped surfaces of said first mentioned element, whereby the general inclination of theplate is changed thereby forming runways and retarding surfaces for the heavier materials.

4. `A plate for spiral separators, said plate having an under elementrand an upper element of less radial dimensions, said under element being provided with a shoulder of helical formation, and said upper element having its periphery adapted to rest on and against said shoulder whereby the inclination is changed and the rise steepened from said shoulder to the outer periphery of said under element.

5. A plate for spiral separators, said plate being composed of an under element having a helically formed shoulder, and an upper a space between thereby allowing the material to drop.

element, the peripheral part of which is adapted to rest on said under element along said shoulder, from which the rise s steepened outwardly to the periphery while its upper edge rests on the upper edge of said under element, the inner edge of said upper element being above said under element with FRANK PARDEE. 

